Ahmed is a statistical epidemiologist and Senior Research Fellow at Bristol Medical School, University of Bristol. He holds a PhD in epidemiology from University College London, a Masters in public health from the University of Essex, and an undergraduate degree in medical sciences from University College Cork. His research revolves around describing physical and mental health trajectories, including the role of early life factors and effects of trajectories on later outcomes. He has expertise in advanced repeated measures analysis and currently holds an MRC Better Methods Better Research New Investigator Research Grant aimed at enhancing growth curve analysis methods. He also leads an international birth cohort collaboration in the A.R.T-HEALTHPARTNERSHIP to investigate effects of assisted reproductive technology on offspring health. He previously worked on LongITools, where he led a research work package examining environmental influences on health trajectories, and he helped set up the EU Child Cohort Network for the LifeCycle project.